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Open Access Long-Term Evaluation of a Selective Retrograde Coronary Venous Perfusion Model in Pigs (Sus Scrofa Domestica)

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Abstract:

The lack of suitable target vessels remains a challenge for aortocoronary bypass grafting in end-stage coronary heart disease. This study aimed to investigate the arterialization of cardiac veins as an alternative myocardial revascularization strategy in an experimental long-term model in pigs. Selective retrograde perfusion of a coronary vein (aorta to coronary vein bypass, retrobypass) before ligation of the ramus interventricularis paraconalis (equivalent to the left anterior descending artery in humans) was performed in 20 German Landrace pigs (Sus scrofa domestica). Retroperfusion of the left anterior descending vein was performed in 10 pigs (RP+) but not in the other 10 (RP–), and the vena cordis magna was ligated (L+) in 5 pigs in each of these groups but left open (L–) in the remaining animals. Hemodynamic performance (for example, cardiac output) was significantly better in the group that underwent selective retroperfusion with proximal ligation of vena cordis magna (RP+L+; 4.1 L/min) compared with the other groups (RP+L–, 2.5 L/min; RP–L+, 2.2 L/min; RP–L–, 1.9 L/min). Long-term survival was significantly better in RP+L+ pigs (112±16 d) than in all other groups. Histologic follow-up studies showed significantly less necrosis in the RP+L+ group compared with all other groups. Venous retroperfusion is an effective technique to achieve long-term survival after acute occlusion of the left anterior descending artery in a pig model. In this model, proximal ligation of vena cordis magna is essential.

Document Type: Research Article

Affiliations: 1: Center of Cardiac Surgery, University Hospital Erlangen, Germany. frank.harig@uk-erlangen.de 2: Department of Anaesthesiology, University Hospital Erlangen, Germany 3: Center of Cardiac Surgery, University Hospital Erlangen, Germany 4: Franz Penzoldt Centre of Animal Research, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany 5: Institute of Medical Physics (IMP), Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany 6: Institute of Pathology, University Hospital Erlangen, Germany

Publication date: April 1, 2011

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  • Comparative Medicine (CM), an international journal of comparative and experimental medicine, is the leading English-language publication in the field and is ranked by the Science Citation Index in the upper third of all scientific journals. The mission of CM is to disseminate high-quality, peer-reviewed information that expands biomedical knowledge and promotes human and animal health through the study of laboratory animal disease, animal models of disease, and basic biologic mechanisms related to disease in people and animals.

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